which may or may not have fuel or other
services).

Highways: This entry includes the total length of the highway system
as well as the length of the paved and unpaved components.

Household income or consumption by percentage share: Data on household
income or consumption come from household surveys, the results
adjusted for household size. Nations use different standards and
procedures in collecting and adjusting the data. Surveys based on
income will normally show a more unequal distribution than surveys
based on consumption. The quality of surveys is improving with time,
yet caution is still necessary in making inter-country comparisons.

Illicit drugs: This entry gives information on the five categories of
illicit drugs - narcotics, stimulants, depressants (sedatives),
hallucinogens, and cannabis. These categories include many drugs
legally produced and prescribed by doctors as well as those illegally
produced and sold outside of medical channels.

Cannabis (Cannabis sativa) is the common hemp plant, which provides
hallucinogens with some sedative properties, and includes marijuana
(pot, Acapulco gold, grass, reefer), tetrahydrocannabinol (THC,
Marinol), hashish (hash), and hashish oil (hash oil).

Coca (mostly Erythroxylum coca) is a bush with leaves that contain the
stimulant used to make cocaine. Coca is not to be confused with cocoa,
which comes from cacao seeds and is used in making chocolate, cocoa,
and cocoa butter.

Cocaine is a stimulant derived from the leaves of the coca bush.

Depressants (sedatives) are drugs that reduce tension and anxiety and
include chloral hydrate, barbiturates (Amytal, Nembutal, Seconal,
phenobarbital), benzodiazepines (Librium, Valium), methaqualone
(Quaalude), glutethimide (Doriden), and others (Equanil, Placidyl,
Valmid).

Drugs are any chemical substances that effect a physical, mental,
emotional, or behavioral change in an individual.

Drug abuse is the use of any licit or illicit chemical substance that
results in physical, mental, emotional, or behavioral impairment in an
individual.

Hallucinogens are drugs that affect sensation, thinking,
self-awareness, and emotion. Hallucinogens include LSD (acid,
microdot), mescaline and peyote (mexc, buttons, cactus), amphetamine
variants (PMA, STP, DOB), phencyclidine (PCP, angel dust, hog),
phencyclidine analogues (PCE, PCPy, TCP), and others (psilocybin,
psilocyn).

Hashish is the resinous exudate of the cannabis or